1 - 20 of 108 Works in Waterfall (Undertale)
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The More You Know! by WhatamIDoing_GoodQuestion
Fandoms: Undertale (Video Game), Deltarune (Video Game)
11 Sep 2025
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Summary
Twice did Seam hear about this strange door from their friends, a door that appeared in a hallway that wasn't always there. Only once did the see that door, and only once did they enter it.
That's how they met The Man.
Like a 5+1 thing but it's a 2+1 instead because that's all I could come up with.
Series
- Part 1 of Darkners? How About Monsters!
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DELTATALE: UNDERRUNE by J88888888
Fandoms: Undertale (Video Game), Deltarune (Video Game)
29 Aug 2025
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Summary
the fun gang get dropped into random spots in undertale
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Perseverance.
Definition: persistence in doing something despite difficulty or delay in achieving success.
This is the story of the fourth human to fall into the Underground.
"My name is AVERY–"
Series
- Part 2 of Undertale/Deltarune Fanfics
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A hint of yellow in an ocean of blue by FernShaw
Fandoms: Undertale (Video Game), Undertale Yellow
23 Jul 2025
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Summary
After the death of Clover, Martlet has to announce to Undyne that she no longer wishes to be part of the royal guard.
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Another human falls, tumbling face-first into the damp rot of Waterfall. When they call out for help, nobody comes— only the weight of something dark and heavy, locked just behind their racing heart.
No tutorial. No resets. No mercy.
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Why write something positive when you can write about your favorite ship when the other one is dead? I feel like this idea has been used many times before but I wanted to try it myself.
I wrote this to practice and I'll probably write a lot of one shots to improve my writing.
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They hadn't meant to hurt anyone; it was self-defense. That's what they'd told themselves.
Against his will, Axis puts an end to that thinking.
Chujin is left to pick up the pieces.Series
- Part 3 of AXIS Model 014
- Language:
- English
- Words:
- 788
- Chapters:
- 1/1
- Kudos:
- 17
- Hits:
- 176
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A prequel Undertale story, starting off with the patience soul! This is her fall and introduciton to Toriel.
Series
- Part 1 of Clichetale
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Nous sommes dans l'AU de Undertale : Disbilief Papyrus.
Au cours d'une route génocide, Sans se met en travers de l'attaque de Frisk, se la prenant au passage et téléportant son frère à Waterfall avant de mourir, Undyne patrouillant à Waterfall pour y intercepté et tué l'humain, va trouvé un Papyrus dévasté...
- Language:
- Français
- Words:
- 1,206
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 36
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Summary
"Okay..." his voice wavered "Well, I got this feeling at the back of my mind, a very new and strange feeling"
The skeleton played with his mittens, calming himself down, making it all easier. "The feeling... as if nothing matters..."or
Depressed Papyrus tells Sans about his feelings.
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i'm gonna clip your wings, cut your strings, babe, you won't feel a thing, now that you're feelin' tall, why don't you fall?
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weapon & accessory.
a plastic toy knife and a faded red ribbon.
Series
- Language:
- English
- Words:
- 1,269
- Chapters:
- 1/1
- Kudos:
- 8
- Hits:
- 494
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Zakkie has always been a lonely lizard. She never made many friends other than her childhood friend Batty and her little brother MK. She was used to this by now but suddenly one trip and a fall of someone that’s not even her ended up changing her entire underground life forever.
OR
I finally make a fanfic of my silly Undertale OC :P
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Eloy & Ilias | Errorink - Error!Sans x Ink!Sans by my_own_new_paradise
Fandoms: Undertale (Video Game)
05 Mar 2024
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Summary
Error felt so much boredom and monotony in his life that he needed something new to fill him with life.
He began to travel through the different alternate universes to investigate which were the most susceptible and possible to be eliminated in the future, until he arrived at Humantale and things were no longer the same...
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For a mission, Cross replaces Swap in an pacifist timeline. With no idea why, he struggles to play along with the plan, causing drama amongst the main characters in Underswap. Could he fix the problem before it gets out of hand? That's for you to find out :) (CANCELED) im so sorry but im to tired of sans stories unless its him just being silly, if anyone would like to take this idea from me i'd be happy to see what you would do with it!
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WiseTale is one of the many prequels to Undertale, it is branched to the main timeline however whether it's the original history of Undertale is still unknown to this day. The AU revolves around the 7th forgotten human that fell after Chara, he is looking for his siblings as they fell down to the Underground. The seventh human is faced with a challenging path will he get to the barrier or will he fall just like...
Series
- Part 1 of Giroverse: The WiseTale Series
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If failed experiments, warped timelines, and emotional family drama weren't trouble already, a seventh human has fallen to tip the balance of fate one way or another. And if one human wasn't bad enough, there may be someone else looking to take a hand in the underground's fate, at least where it concerns a couple of skeletons...
The continuing of an Alternative Timeline of Zarla's Handplates in which the interference of the Ukagaka Human causes Gaster to reassess his priorities.
Series
- Part 3 of To The Marrow
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Can we Pretend that Holograms in the Underground are Like Shooting Stars by butch_boy
Fandoms: Undertale (Video Game)
10 Nov 2023
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WELCOME BEAUTIES, TO MY TELEVISION SHOW- LIVE FROM HOTLAND!! AS ALWAYS I’M YOUR HOST, METTATON!!
Now there was energy, excitement, showmanship! Papyrus never had the chance to express himself before his arrival in Snowdin. Perhaps this was a chance for a new first impression? Papyrus was glued to the screen. Not literally of course, but he may as well be. Papyrus watches in sincere admiration for hours. That is, until Sans walks over to the couch.
hey bro, there’s someone at the door asking for ya
(COULD IT BE… M-METTATON??)
Papyrus is having trouble finding his place after moving into Snowdin
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The human player, Marsh, takes interest in Papyrus. Marsh begins to unravel reality and rewrite the medium he is in to establish him as King of the Underground, much to his dismay.
Series
- Part 1 of Crescent Novelist Prompts
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Many years later, Sans settled as the assistant of Gaster in the CORE, meanwhile Papyrus earned a position as Royal Sentry. One day unexpectedly, a local of Snowdin Town shows up at Gaster's doorstep, requesting to see Papyrus about something.
Series
- Part 4 of Handplates Determination
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It's funny how some places can become extra special. Reminders of the good times remain a-plenty, but in some spots more than others.
or,
The guard-princess couple sit down and do some reminiscing. A lot of it just happens to take place in the rain.
For the Frans Monthly challenge of August (My Birth Month!) 2023 (Rain).
Series
- Part 4 of Just A Guard
- Part 5 of Frans Monthlies 2023